thorium uranium potassium

The average concentrations of potassium, rubidium, strontium, thorium, and uranium in oceanic tholeiitic basalt are (in parts per million) K, 1400; Rb, 1.2; Sr, 120; Th, 0.2; and U, 0.1. The ratio Sr87 to Sr86 is about 0.702, that of K to U is 1.4 x 104, and of Th to U is 1.8. These amounts of K, Th, U, and radiogenic Sr87 are less than in other common igneous rocks.

The uranium and thorium content of these older rocks, measured by gamma-ray spectrometry, is more than twice the average for silicic igneous rocks in general. Younger granites of the area also have high concentrations, suggesting that this is a uranium-thorium-rich province.

Uranium is associated mainly with organic matter and partly with apatite (phosphate clasts of fish skeletons) and calcite; thorium, with clay minerals; potassium, with clay minerals and K-feldspar. The U content is 345 ppm at high apatite concentration (7%).

content is stated, radium-equivalent uranium is implied. The coefficient of variation for the accuracy of the radioelement data, when compared to ana lyses by isotope dilution and flame photometry is about 3 percent for radium-equivalent uranium and thorium and about 1 percent for potassium.

The average concentrations of potassium, rubidium, strontium, thorium, and uranium in oceanic tholeiitic basalt are (in parts per million) K, 1400; Rb, 1.2; Sr, 120; Th, 0.2; and U, 0.1. The ratio Sr87 to Sr86 is about 0.702, that of K to U is 1.4 x 104, and of Th to U is 1.8. These amounts of K, Th, U, and radiogenic Sr87 are less than in other common igneous rocks.

Mar 28, 2011· Spectral Gamma-ray logging, in which Thorium (Th), Potassium (K) & Uranium (U) gamma-ray wavelength are distinguished, allows the differentiation of these three mayor radio-isotopic sources. Analysis of the sources of the natural gamma radiation can provide information on the composition and likely lithology of a formation.

If thorium and/or potassium are low, and uranium is high, then the rock is not shale. Other data such as PE, density, and neutron are then used to define the porosity and rock type. However, if thorium or potassium is high, with or without uranium, then some shale should be suspected, and accounted for.

Potassium 40, with a half-life of 1.277 billion years, Uranium 238, with a half-life of 4.468 billion years, and; Thorium 232, with a half-life of 14.056 billion years. The consensus view amongst geochemists is that there is very little, if any, of any of these isotopes in the Earth's core. Potassium, thorium, and uranium are chemically active.

Potassium 40 is a radioisotope that can be found in trace amounts in natural potassium, is at the origin of more than half of the human body activity: undergoing between 4 and 5,000 decays every second for an 80kg man. Along with uranium and thorium, potassium contributes to the natural radioactivity of rocks and hence to the Earth heat.

In gamma ray spectral logging, the three main gamma ray contributors, potassium, thorium, and uranium, give gamma rays of different energy levels. By appropriate filtering, the total gamma ray flux can be separated into the three components.

Potassium, Uranium, Thorium (KUT) Curves. The Woodford Shale shows slightly higher potassium and slightly lower thorium levels than the Kinderhook Shale, which suggests that it may have a higher illite content. The uranium curve is scaled in ppm and reaches a maximum of about 43 ppm at the top of the Woodford Shale. Since uranium is linked with ...

Jun 29, 2007· INTRODUCTION. Radioactivity of soil environment is one of the main sources of exposure to humans. Hence it is important to know its distribution, gamma radiation from radionuclides which are characterised by half-lives comparable to the age of the earth, such as 40 K and radionuclides from the 238 U and 232 Th series. Their decay products represent the main external source of …

Thorium, uranium, and potassium concentrations in specific areas near the lake are somewhat higher than average concentrations around the world. Visual inspection of Lake Issyk-Kyol's white, sandy beaches near the towns of Bokonbaevo and Kadji-Sai show a

Thorium tends to increase with potassium, The distribution of thorium, uranium, and potassium in the Mancos shale 1131 giving a nearly constant K/Th ratio of about 2200. The variations in the amount of potassium are slight (see Table 1) and it is difficult to interpret the data.

The calibration of a portable three-channel gamma-ray spectrometer for in situ analysis of thorium, uranium, and potassium is discussed. A method of regression analysis is suggested as the best means of including all of the data available from the calibration stations. Calibration indicates a nonlinear relation between count rates obtained in the field and concentrations in parts per million ...

This uranium can produce what appear to be hot sands on a gross gamma ray log. Using the uranium-free gamma ray curve from a spectral tool (CGR, in Schlumberger's mnemonics) can circumvent this problem and improve sand/shale discrimination in such environments. Occasionally, the ratio of thorium to potassium can be exploited in clay typing.

the dry season while Uranium, Thorium and Potassium were beyond the limit of detection during the wet season The ED-XRF technique showed that 31.40±0.14 ppm of Potassium was present in algae during dry the season. Uranium, Thorium and Potassium were beyond detection limit in the water samples using ED-XRF.

The average concentrations of potassium, rubidium, strontium, thorium, and uranium in oceanic tholeiitic basalt are (in parts per million) K, 1400; Rb, 1.2; Sr, 120; Th, 0.2; and U, 0.1. The ratio Sr87 to Sr86 is about 0.702, that of K to U is 1.4 ?? 104, and of Th to U is 1.8. These amounts of K, Th, U, and radiogenic Sr87 are less than in other common igneous rocks.